Just got laid off, what should I do first? - what worked for you?

They called a meeting on Wednesday and 18 of us were let go. I had been there 18 years. I have read a lot of threads here and could not find my exact situation. I have a box of my things and a short letter about benefits. Which steps were urgent?

I made a short list: benefits, bills, documents, and then my résumé. One thing each day kept me steady.